<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Document</title>
    <style>
        .box {
            position: relative;
            width: 220px;
            height: 220px;
            margin: 0 auto;
        }
        .son {
            display: none;
            position: absolute;
            top: 0;
            left: 0;
            width: 220px;
            height: 220px;
            background: rgba(0, 0, 0, 0.5) url('./img/arr.png') no-repeat center center;
        }

        .box a:hover .son {
            display: block;
        }
    </style>
</head>
<body>
    <div class="box">
        <a href="#">
            <div class="son">
            </div>
             <img src="./img/3.jpg" alt="">
        </a>
    </div>
</body>
</html>